Laserfiche WebLink
2018 WWasVngton State Energy Code—Residential <br /> Prescriptive(Energy Code Compliance for All Climate Zones in Washington <br /> Single Family--New&Additions(effective February 1,2021) <br /> Table 406.3—Energy Credits(Single Family) <br /> Options _ Description Credits:SF <br /> S. EFFICIENT WATER HEATING OPTION;. -- <br /> Only one option from Items 5.2 through 5.6 may selected in this category.Item 5. combined with any option.1 may be <br /> y _ <br /> A drain water heat recovery unit(s)shall be installed,which captures wastewater heat from <br /> all and orily the showers,and nas a minimum efficiency of 40%If installed for equal flow or a <br /> minimum efficiency of 54%if installed for unequal flow.Such units shall be rated in <br /> accordance with CSA B55.1 or IAPIMO IGC 346-2017 and be so labeled.eled. 0.5 <br /> To qL alif�r to claim this credit,the building permit drawings shall include a plumbing diagram <br /> that s.peclfies the drain water heat recovery units and the plumbing layout needed to install it. <br /> Labels or other documentation sh:311 be provided that demonstrates that the unit complies <br /> with :he standard. <br /> 5 2 Water heating system shall include one of-the <br /> Energy Star rated gas or propene water heater with a minimum UEF of 0.80.5 0.5 <br /> Water heating system shall include one of the following: <br /> Ener€,y Star rated gas or propene water heater with a minimum UEF of 0.91 or <br /> Solar water heating supplementing a minimum standard water heater.Solar water heating <br /> will provide a rated minimum savings of 85 therms or 2000 kWh based on the Solar Rating and <br /> Certification Corporation(SRCC)Annual Performance of OG-300 Certified Solar Water Heating <br /> 5.3 Systems or 1.0 <br /> Water heater heated by grour d source heat pump meeting;requirements of Option 3.3. <br /> To qc alifye to claim this credit,the building permit drawings shall specify the option being <br /> selected and shall specify the water heater equipment typE!and the minimum equipment <br /> efficiency and,for solar water heating systems,the calculation of minimum energy savings. <br /> Water heating system shall in:lucle one of the following: <br /> Electric heat pump water hea:er meeting the standards for Tier I of INEEA's advanced water <br /> heating specification or <br /> 5.4 For R-2 Occupancy,electric heat pump water heater(s), meeting the standards -or Tier I of 1.5 <br /> NEEA's advanced water heating specification,shall supply domestic hot water to all units. If <br /> one water heater is serving more':han one dwelling unit, all hot water supply and <br /> recirculation piping shall be insulated with R-8 minimum pipe insulation.5 <br /> Water heating system shall iin:lud,e one of the following:Electric heat pump water heater <br /> meeting the standards for Tier III of NEEA's advanced water heating specificaticn or <br /> 5.5 For R-2 Occupancy,electric hEat pump water heater(s), meeting the standards -or Tier III of 2.0 <br /> NEEA's advanced water heating specification,shall supply domestic hot water to all units. If <br /> one water heater is serving more than one dwelling urit, all hot water supply and <br /> recirculation piping shall be insulated with R-8 minimum pipe insulation.5 <br /> Water heating system shall in:lucl a one of the following: <br /> Electric heat pump water hE!ater with a minimum UEF of 2.9 and utilizing a split system <br /> configuration with the air-to-refrigerant heat exchanger located outdoors. Equipment shall <br /> meet Section 4, requirements for all units, of the NFEA standard Advanced Water Heating <br /> Specification with the UEF noted above or <br /> 5.6 2.5 <br /> For I Occupancy,electric hEat pump water heater(s), ME-eting the standards -or Tier III of <br /> NEI advanced water heating specification and utilizing a split system configc ration with <br /> the air-te-refrigerant heat exchanger located outdoors,shall supply domestic hot water to all <br /> units. If one water heater is serving more than one dw=lling unit,all hot water!upply and <br /> recirculation piping shall be insulated with R-8 minimum pipe insulation.5 <br /> 5 To qualify to claim this credit,the building permit drawings shsJl specify the option beirg selected and shall <br /> specify the water heater equipment type and the minimum eq jipment efficiency. <br /> Prescriptive Path -Single Family 2)18 Washington State Energy Code-R 7 <br />